使用增白牙膏，或洗牙来使你的笑容更亮丽，可以在手包里放些清新口气的糖。

Use whitening toothpaste or strips to make your smile brighter and carry breath dragees in your handbag.

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目的：探讨弹性包绕式垫加螺旋扩弓器矫治替牙期后牙反的适用性及治疗前后的牙颌结构变化。

Objective:To evaluate the maxillary expansion effects of posterior crossbite patients treated with elastic wrapping bite guard and screw expansion mechanic in the mixed dentition.

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